Timing education
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Junior User
Joined: Feb 2006
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From: Harrisburg area Pa.
Timing education
I know this is a very general question but this is my first rebuild so please bear with me....lol...here goes.
ok im replacing the cam and timing set in my 390 (if you have seen any of my past posts in the FE forum you know why....lol) Im pretty new to this.. so my question is... the lower timing gear i removed only had one groove in it so it could only go onto the crank one way.... The new set i ordered from comp cams has 3 grooves in it, -4, 0 and +4 degrees. Im not quite sure why this is or what the benefits of this is.
Can some one please try to explain this to me? Should i just go with the 0 (im assuming this is what the single groove on the original gear was) what is the purpose of the - and +4 degrees?
This is the cam set i bought(and no i didnt pay that much...lol)
http://www.compperformancegroupstor...4&Category_Code=
Thanks,
Newby Tom
ok im replacing the cam and timing set in my 390 (if you have seen any of my past posts in the FE forum you know why....lol) Im pretty new to this.. so my question is... the lower timing gear i removed only had one groove in it so it could only go onto the crank one way.... The new set i ordered from comp cams has 3 grooves in it, -4, 0 and +4 degrees. Im not quite sure why this is or what the benefits of this is.
Can some one please try to explain this to me? Should i just go with the 0 (im assuming this is what the single groove on the original gear was) what is the purpose of the - and +4 degrees?
This is the cam set i bought(and no i didnt pay that much...lol)
http://www.compperformancegroupstor...4&Category_Code=
Thanks,
Newby Tom
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Put in the center one.
This was the problem with the 351M/400.
They came out with an 8* retarded cam gear because of emissions.
Have you heard the term "set the Timing Gears Straight Up" ?
This means setting it to the center slot...so it is not retarded or advanced......the way it should be
This was the problem with the 351M/400.
They came out with an 8* retarded cam gear because of emissions.
Have you heard the term "set the Timing Gears Straight Up" ?
This means setting it to the center slot...so it is not retarded or advanced......the way it should be
